From lights to Screens: the evolution of LED
Over the years, we have been using LED in our day to day life in some way or the other and we don’t even appreciate this creation. LED has many applications; these include backlight sources, Display screens, electronic equipment, lighting, etc.
What is an LED?
LED stands for Light Emitting Diode and it is a two end semiconductor light source. For the preparation of this diode, you need to accumulate two unique materials and create a new PN junction. “P” in PN junction refer to excess positive charge (“holes,” indicating the absence of electrons) while the “N” in PN junction refer to excess negative charge (electrons). In 1907, a British experimenter makes use of a crystal of silicon carbide and a cats whisker detector to discover Electroluminescence. However, LED was firstly invented by Soviet inventor Oleg Losev in 1927.
How does an LED work?
Firstly, an absorbed light energy is converted into electric current by PN junction. The similar procedure is inverted here (i.e. the P-N junction emits light when electrical energy is applied to it). The electric field will influence the semiconductor to produce a light phenomenon called electroluminescence. Then two chargers present in PN junction get to combine with the electron holes present in the device when the voltage level of an electron is proper. These two chargers emit energy in the form of photons.
In the early days, LEDs were basically used only for display and were used to act as the neon light producing lamps. As time went on, more and more colors were found out according to the wavelength emitted by the LED and its applications increased in high number in San Jose Led Screens.
An LED screen is a flat panel display, which uses an array of light-emitting diodes as pixels for a video display. The first LED display was created in 1977 by James P. Mitchell. LED screen can provide very clear and high-quality display. Large displays now use high-brightness diodes to generate a wide spectrum of colors. In 2012, Crystal LED was produced by Sony. It is a TV that produces actual images with a true LED-display. It does not only provide backlighting for other types of display.
Nowadays, Visual Impact Productions LED screens in 3D video format are also available.
Advantages of LED Screen
- LED monitors are more superior in terms of picture quality, specifically in colour intensity as well as motion blurring when compared to LCD Display.
- LED monitors have a crisp contrast in dark colors. It produces darker images by diffusing the light of the corresponding diodes.
- LED screens help save energy and are lighter and thinner in comparison to LCD screens.